ns3.amatisnetworks.com has no CNAME records.
Question and response
Question
dig ns3.amatisnetworks.com. NS
Answer
The response has no answer records.
Authority
amatisnetworks.com. 1582 SOA joan.ns.cloudflare.com. dns.cloudflare.com. 2397919843 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0